Chapter 7 – Fault Tracing
ACA 635 IGBT Supply Sections
7-7
Flowchart
Use this flowchart for tracing the cause of an earth fault indication and
for locating faulty parts. The flowchart includes remedies.
Earth fault
indication
TN
network?
Yes
Measure
Earth leakage on
motor or cabling?
Yes
No
Change
:
damaged motor,
switchgear or
cabling
Yes
No
Fault fixed?
Check
whether
Par. 160.01 IU and
Par. 160.03 IW are
appr. 0 A when
UDC is on.
No
Yes
Change
:
1. NINT board
2. current transducers
3. cabling between NINT
and NXPP boards and
current transducers
4. NXPP board
Set Par. 30.03 EARTH
FAULT LEVEL to 4.
Fault fixed?
Yes
No
No
Frame Size
2xR11i, 2xR12i
4xR11i or 4xR12?
Yes
Is the
difference between
Par. 3.12 PP 0 TEMP
to Par. 3.15 PP 3
TEMP < 5 °C?
Yes
No
A faulty
fibre between NINT
and NPBU
boards?
Change
the fibre.
Yes
No
Contact ABB for
permission to set Par.
30.03 EARTH FAULT
LEVEL to 5.
Fault fixed?
Yes
No
Contact ABB for
permission to set Par.
30.03 EARTH FAULT
LEVEL to 6.
Fault fixed?
Yes
No
Change
cabling to
less
capacitive
1.
Locate
the hottest power plate: See
Par. 3.12 PP 0 TEMP to Par. 3.15 PP 3
TEMP and
ACS 600 Service Manual:
Indicator LEDs on the NINT and NXPP
Boards
.
2.
Change
the NGDR board of the hottest
power plate.
Fault fixed?
Yes
No
Change
the NGDR
board of the adjacent
power plate.
Fault fixed?
Yes
No
Faulty
NGDR
board. No
control.
Faulty
NGDR
board.
Breakthrough
fault.
OK
No
Содержание ACS 600 MultiDrive
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